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Cellular networks are a critical component of the economic and social infrastructures in which we live. In addition to voice services, these networks deliver alphanumeric text messages to the vast majority of wireless subscribers. To encourage the expansion of this new service, telecommunications companies offer connections between their networks and the Internet. The ramifications of such connections, however, have not been fully recognized. In this paper, we evaluate the security impact ofdoi:10.1145/1102120.1102171 dblp:conf/ccs/EnckTMP05 fatcat:5b2wefzjqrgo5pagr3w2xgaiwq